Birthelmer, Marty
Current rating: 1442
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 97 | Finlayson-Schueler, Brian (1518) | Won 2-0 | +201470 |
| 3block | 100 | Durney, Ryan (1565) | Lost 1-2 | -171453 |
| 4block | 182 | Bailie, Scott H (1499) | Lost 1-2 | -171436 |
| 5block | 221 | Laflamme, Patrick (1500) | Lost 1-2 | -171419 |
| 6block | 227 | Camerino, Dario (1481) | Won 2-0 | +191438 |
| 7block | 172 | Rioux, Marc-Antoine (1500) | Won 2-0 | +201458 |
| 8block | 126 | Buffett, Nick (1517) | Lost 0-0 | -171441 |
| 9block | 98 | McKendy, Brendan J (1500) | Draw 0-0 | +11442 |
| top | average opponent: 1510record: 3-4-1 | new rating: 1442 | ||
| Grand Prix Columbus 2007 (legacy) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 4 | Wilson, Anthony (1465) | Won 2-1 | +181499 |
| 3legacy | 20 | Jaco, Jason (1518) | Lost 1-2 | -181481 |
| 4legacy | 114 | Jones, Trent (1589) | Lost 1-2 | -161465 |
| 5legacy | 286 | McLaughlin, Keith (1658) | Lost 0-2 | -151450 |
| top | average opponent: 1558record: 1-3 | new rating: 1450 | ||
| Grand Prix Toronto 2006 (DIS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 17 | Ormut Fleishman, Zak (1500) | Won 2-0 | +181518 |
| 2sealed | 48 | Erla, Bradley (1464) | Draw 1-1 | -11517 |
| 3sealed | 81 | Baines, David J (1518) | Won 2-0 | +181535 |
| 4sealed | 68 | Shapiro, Yakov (1522) | Lost 1-2 | -181517 |
| 5sealed | 113 | Black, Samuel (1466) | Draw 1-1 | -11516 |
| 6sealed | 115 | Hubber, Rick (1518) | Lost 0-2 | -181498 |
| 7sealed | 104 | Gillham, Jacob (1548) | Lost 0-2 | -171481 |
| top | average opponent: 1505record: 2-3-2 | new rating: 1481 | ||